>Sometimes the 78/79 series regulators can be "pulled" into protect
>mode by a supply of the opposite polarity during turn-on.
<snip>
>If that's the case for you, the fix is simple: Add a reverse-polarity
>protection diode (1N4002 or similar) from each supply output to
>ground.

Thanks a ton, that seemed to do the trick beautifully. I KNEW there was a
simple solution...

Dave